"We do not make a tanno-gallate of iron ink without added color, and so far as we know, there is no such ink on the market, as it would be practically colorless and illegible." * * * * * * * "There is no such ink (a tanno-gallate of iron ink without added color) manufactured by any ink- maker as far as I know. It is obsolete." The commercial names bestowed on the multitude of different inks placed on the market by manufacturers during the last century are in the thousands. A few of them are cited as indicative of their variety, some of which are still sold under these names. Kosmian Safety Fluid, Bablah Ink, Universal Jet Black, Treasury Ledger Fluid, Everlasting Black Ink, Raven-Black Ink, Nut-gall Ink, Pernambuco Ink, Blue Post Office Ink, Unchangeable Black, Document Safety Ink, Birmingham Copying Ink, Commercial Writing Fluid, Germania Ink, Horticultural Ink, Exchequer Ink, Chesnut Ink, Carbon Safety Ink, Vanadium Ink, Asiatic Ink, Terra-cotta Ink, Juglandin Ink, Persian Copying, Sambucin, Chrome Ink, Sloe Ink, Steel Pen Ink, Japanese Ink, English Office Ink, Catechu Ink, Chinese Blue Ink, Alizarin Ink, School Ink, Berlin Ink, Resin Ink, Water-glass Ink, Parisian Ink, Immutable Ink, Graphite Ink, Nigrilin Ink, Munich Ink, Electro-Chemical, Egyptian Black, "Koal" Black Ink, Ebony Black Ink, Zulu Black, Cobalt Black, Maroon Black, Aeilyton Copying, Dichroic, Congress Record, Registration, "Old English," etc. The list of over 200 names, which follow, includes those of manufacturers of the best known foreign and domestic "black" inks and "chemical writing fluids" in use during the past century, as well as those of the present time.